Giving 50 points to whoever can answer just the first column. Thank you :)

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Acylinder has volume 45π and radius 3. what is it’s height?

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters